How do you determine longitude and latitude with a chronometer?

Answer 1

-- Set the clock to the time at your home, and make a note of the longitude at your home.

-- Go somewhere and take the clock with you. The clock must keep accurate time.

-- Watch the sun. When the sun reaches its highest altitude above the horizon,

note the time indicated on the clock.

-- If the time on the clock is before noon, then you are east of your home.

If the time on the clock is after noon, then you are west of your home.

-- (15) times (the number of hours between noon and the time on the clock)

is equal to number of degrees of longitude between your present location and

your home.

The touchiest part of this whole operation is the accuracy of the portable clock.

If Leif Ericcson or Christopher Columbus had had anything as good as the cheap

digital wristwatch that I bought from a street vendor a few years ago for 75¢ ,

the history of the New World's discovery would have been completely different.

Answer 2

To determine longitude with a chronometer, you need to compare the time shown by the chronometer with a reference time (such as Greenwich Mean Time) to calculate the time difference. This time difference can then be used to determine the difference in longitude by applying the formula: 15 degrees of longitude for every hour of time difference. Latitude, on the other hand, is determined using celestial navigation techniques, such as measuring the altitude of celestial bodies like the Sun or stars above the horizon.

Answer 3

difference between local time and GMT (Greenwich mean time) if local time is ahead of GMT it is east and if it is behind GMT it is east each hour = 15 degrees.

Answer 4

http://ihateliz.com/?id=gi23xvfjmozn0l8up0un69q4s7urxu

Answer 5

the longitude, by observing the sun, the moon or the stars.